# MTX_Ortho

## C Specification

      #include <nitro/fx/fx_mtx44.h>

      void MTX_Ortho(
          fx32 t,
          fx32 b,
          fx32 l,
          fx32 r,
          fx32 n,
          fx32 f,
          MtxFx44* mtx
      );

## Description

This function sets an orthogonal projection matrix to *mtx. It uses the Divider. The diagram shows the matrix that is set.

(Caution) If you set an orthogonal projection, you must use `G3*_SwapBuffers` to select Z buffering. W buffering will not function properly because the depth value will always be fixed.

## Arguments

`t` | Y coordinate at the top of the near clipping plane
`b` | Y coordinate at the bottom of the near clipping plane
`l` | X coordinate at the left of the near clipping plane
`r` | X coordinate at the right of the near clipping plane
`n` | Distance from the eyepoint to the near clipping plane
`f` | Distance from the eyepoint to the far clipping plane
`mtx` | Pointer to a 4x4 matrix

## Return Values

None

## See Also

`G3_Ortho, MTX_Frustum, MTX_Perspective`

## Revision History

04/27/2004 Initial Version